U.S. & World

Tyson was host of "Cosmos: Possible Worlds" on Fox in 2014. A new edition of the series was set to air in March on the network and on National Geographic.

He has denied an accusation that he groped a woman and denied making sexual advances toward a production assistant at his home. Tyson apologized for making the assistant feel uncomfortable.

He has said he will cooperate fully with an "impartial investigation."

"StarTalk" began its fifth season Nov. 12, with a handful of episodes aired before the show was put on hold. Guests for the previously announced 20 episodes include former Vice President Al Gore, writer George R.R. Martin and actors Jack Black and Jeff Goldblum.

A representative for Tyson did not immediately respond to a request for comment Thursday regarding the "StarTalk" hiatus.

This story corrects the month the investigation was announced. It was announced in November.